export function isPlainLanguage(language: string | null | undefined): boolean;
export function isEngineLoaded(): boolean;
export function isEngineUnavailable(): boolean;
export function isCodeLanguageLoaded(language: string): boolean;
export function loadEngine(editor?: LexicalEditor, codeNodeKey?: NodeKey): Promise<void> | undefined;
export function normalizeCodeLanguage(language: string): string;
export function loadCodeLanguage(language: string, editor?: LexicalEditor, codeNodeKey?: NodeKey): Promise<void> | undefined;
export function isCodeThemeLoaded(theme: string): boolean;
export function loadCodeTheme(theme: string, editor?: LexicalEditor, codeNodeKey?: NodeKey): Promise<void> | undefined;
export function getHighlightNodes(codeNode: CodeNode, language: string): LexicalNode[];
export function highlightCodeToHTML(code: string, language: string, { theme }?: {
    theme?: string | undefined;
}): string | undefined;
import type { LexicalEditor } from 'lexical';
import type { NodeKey } from 'lexical';
import type { CodeNode } from '@lexical/code-core';
import type { LexicalNode } from 'lexical';